Water-heating attachment.



No. 818,149. EATENTED APE. 17, 1906.

E. E. DONALDSON. WATER HEATING ATTACHMENT.

APPLICATION FILED 0OT.6.1905.

Nil

UNITE STAIES vPATENT OFFICE.

FRANK E. DONALDSON, OF PALOS PARK, ILLINOIS, ASSIGNOR OF ONE- HALF TO HARRY W. DONALDSON, OF CHICAGO, ILLINOIS.

WATER-'HEATING ATTACHMENT.

Specification of Letters Patent.

Patented April 17, 1906.

To @ZZ whom, t may concern/f Be it known that I, FRANK E. DONALDSON, a citizen of the United States, residing at Palos Park, in the county of Cook and State of Illinois, have .invented certain new and useiul Improvements in Water-Heating Attachments for Heat-Generators, of which the following is a specification.

My invention relates to water-heating attachments for heat-generators, and has for its general object to provide a device of the character described which is simple in construction, easy of manufacture7 and e'Hicient in operation, affording a very large heatingsurface to the gases of combustion, and so constructed as to insure the proper application oi' the hot gases of combustion to the exterior surface of the heater.

In the drawings, wherein I have illustrated an embodiment of my invention, Figure 1 is a side elevation, with parts broken away, of my improved water-heater; and Fig. 2 is a plan view of the heater reversed.

Throughout the drawings like characters of reference refer always to like parts.

In the drawings, A and A indicate two structures forming the major portion or superstructure of my heater, and B indicates in general the water-heating base thereof. The structures A A are substantially duplicates, and it will be apparent that any number of such structures from one up may be employed, according to the vertical extent of the space available for the heater. Said.

structures A A comprise, respectively, the tubular cylindrical bodies 5 5 and hollow wings 6 6, the wings of each structure in the aggregate forming substantially a circle in plan, spirally disposed upon the tubular cylindrical body 5 or 5 in open communication therewith. For convenience in casting I prefer that iour wings, each of substantially quadrant shape, be employed on each structure A or A, though it is apparent that the number might be changed and the extent of each wing proportionaly varied. I also pre- `fer that the upper surface at the top of each wing be slightly inclined, as shown at Fig. 1.

Where a plurality of structures A A are employed, the structures are secured in superposed position, preferably in such relation that the spiral wings of one section form approximately continuations of the spiral wings of the adjacent sections, and suitable openings for a communication between the two structures are provided. In the preferred construction specifically shown the bodies 5 5 of sections A A are provided at their adjoining ends with threaded apertures 7 7, respectively, in which apertures is screwed a-threaded nipple 8, centrally apertured, as at 9, to provide communication between the hollow interiors of said bodies.

The base B comprises, preferably, a hollow structure 10, substantially semicircular in plan and semi-arched in side elevation, there being provided on said structure a boss 11, whereon the body 5 of the structure A may seat, and a laterally-extending boss 12 at its bottom apertured, as at 12, for the receptiony of the inlet-pipe 13. A downwardly-extending boss 12 may also be provided for attachment of a vertical inlet-pipe. It will be understood that the base structure is hollow throughout all the parts described. Preferably, also, the base structure is provided with an opening 14 therethrough to afford a passage of hot gases. The base and upper structure are secured together by a nipple 8 having therein an aperture 9 in the same manner as are secured together the structures A and A so that the hollow base and the superstructure are in open communication.

At the upper end of the superstructure an outlet 15 is provided in which may be threaded the outlet-pipe 16.

In use the attachment is placed above the rire-box of the heater with the iiat side of the base B facing the door and the down curve of the base extending toward the back of the Ere-pot, support being afforded to the attachment by the inlet and outlet pipes 13 and 16, suitably braced in the walls of the furnace.

In operation, it will be apparent, water is introduced into the attachment through the inlet-pipe 13 and becomes heated therein by the hot gases which flow about the base B and through the opening 14 thereof, and thence are directed spirally by the spiral wings 6 and 6 through the spiral channels left therebetween until they escape above the attachment. The spiral course thus formed is of relatively great length in relation to the height of the attachment, so that a greater proportion of the heat may be imparted to the attachment than were the passa es vertical, and, furthermore, the constant c eflection IOO of the hot gases from the vertically-upward course, which they tend to take, brings such gases into intimate contact with the walls of the attachment, increasing the efficiency of the heater.

The inclination of the top surface of the wings insures that no air pocket will be formed should the attachment be set slightly out of plumb.

While I have herein described in some detail a specific embodiment of my invention which I deem to be novel and advantageous in its details, I do not desire to be understood as limiting the broader conception of my invention to the exact construction shown and described, as it will be apparent that changes might be made in the specific construction without departure from the spirit and scope of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States,is

l. In a water-heating attachment for heatgenerators, a tubular body having a continuous axial opening therethrough, and spiral, hollow win s communicating with the opening in said ody, there being inlet and outlet openings in the structure, communicating with the continuous axial opening.

2. In a water-heating attachment for heatgenerators, a tubular body, and spiral wings substantially quadrant in shape, said wings beingl hollow and communicating with the said body, and there being inlet and outlet openings in the Structure.

3. In a water-heating attachment for heatgenerators, a structure comprising a tubular body, and a plurality of wings thereon arranged spirally of the body and occupying in the aggregate substantially a complete circle in plan measurement, said structure vhaving inlet and outlet openings to the body in the ends thereof. y

4. In a water-heating attachment for heatgenerators, a plurality of structures each comprising a tubular body and spiral hollow wings on said body each communicating with the interior thereof, said structure being secured together in superposed relation and provided with openings for intercommunication.

5. In a water-heating attachment for heatgenerators, a plurality of structures each comprising a tubular body and spiral, hollow wings on said body communicating with the interior thereof, said structures being superposed one upon the other, hollow nipples 8 connecting said bodies for communication, and there being openings in the lowermost and uppermost structures for the inlet and outlet of water.

6. In a water-heating attachment for heatgenerators, a superstructure comprising a tubular body and spiral hollow wings on said body communicating therewith, and a hollow base or relativeIy short vertical extent and relatively great horizontal extent, arranged for communication with said superstructure, there being provided an inlet to the base a'nd an outlet from the superstructure.

7. In a device ofthe character described, a superstructure comprising a hollow cylindrical body, and a hollow spiral wing communicating with the interior of said body, and a base comprising a semicircular, semiarched portion detachably secured to said structure and having communication therewith, there being provided an inlet-opening in the base and an outlet-opening in the superstruoture.

In testimony whereof I hereunto set my hand in the presence of two witnesses.

FRANK E. DONALDSON.

In presence of- FORE BAIN, MARY F. ALLEN, 

